Will weight loss impact my new hair?

I would really appreciate your professional opinion on this matter: I have 10-12 kilograms of weight to lose. It’s been a long time since I did sports or any restriction on my diet. The reason of avoiding such dietary and physical stress is to avoid losing hair. Currently I am following a hair loss regime (since December 2019) that is giving me drastic regrowth of my MPB and is reversing it. However because of my overwhelming joy and care about that regrowth, I am afraid of such physical stresses will lead to more hair loss because of shock (TE) and Testosterone rise. What do you think of that? Am I taking it too far in overthinking it? If yes what kind of diet and physical exercises do you recommend?

Good exercise and a reasonably restrictive diet without starvation and with good nutrition will allow you to keep your hair while losing weight.